Speaker



FIG. 1 is a front perspective view of a speaker, showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a side view thereof, the opposite side being a mirror image of FIG. 5; and,

FIG. 6 is a top view thereof, the bottom view being a mirror image of FIG. 6.

The portions shown in broken lines in FIGS. 1-6 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a speaker, as shown and described. 